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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7434548 | Control device for hydraulic actuator in piston In a control device for a hydraulic actuator, one end of an oil passage that is provided through a connecting rod, a crankshaft and a crankcase supporting the crankshaft is connected to a hydraulic chamber of a hydraulic actuator provided in a piston connected to th... | 10/14/2008 |
| 7353785 | Compression ratio variable device of internal combustion engine An internal combustion engine variable compression ratio system is provided that includes a piston inner (5a), a piston outer (5b) that is fitted around the outer periphery of the piston inner (5a) so that it can slide only ... | 04/08/2008 |
| 7334554 | Piston A piston includes a spring acting between the piston crown and a connecting rod so as to bias the connecting rod away from the crown of the piston. The spring may include a pair of disc springs supported at their edge portions. The support may be a substantially ann... | 02/26/2008 |
| 7318397 | High efficiency high power internal combustion engine operating in a high compression conversion exchange cycle A piston (10), a spring (15) operatively coupled to a piston, the spring being inside (21) or outside (41) the piston, and if the spring is inside the piston, the diameter of the spring is equal to 0.7 to 0.9, and if it is outside of the ... | 01/15/2008 |
| 7318401 | Variable chamber volume phaser A variable cam timing phaser including a housing, a rotor coaxially located within the housing, a phase control valve, a switching valve, and a passage connecting the first advance and retard chambers. The housing and the rotor define at least two chambers, a first ... | 01/15/2008 |
| 7311075 | Split piston for an internal combustion engine The invention relates to a split piston for an internal combustion engine, comprising an upper piece, connected to a lower piece, by means of a screw connection. The screw connection comprises a tubular connector piece, mounted on the underside of the piston upper p... | 12/25/2007 |
| 7284512 | Compression ratio variable device of internal combustion engine An internal combustion engine variable compression ratio system includes a piston inner, a piston outer that, while being fitted around the outer periphery of the piston inner, so it slides only in the axial direction, is capable of moving among low (L), high (H), a... | 10/23/2007 |
| 7273022 | Concentric piston for variable compression ratio directly based on the combustion chamber pressure This invention produces a variable compression ratio in internal combustion engines, based on a sliding concentric piston which moves up by an internal spring and down by the different changing pressures over the concentric piston head, within the combustion chamber... | 09/25/2007 |
| 7146940 | Combustion engine Disclosed is a combustion engine. The engine includes a combustion chamber (40), which is delimited at one end by a head (41) and delimited at a second end by a piston (1). The piston is arranged on a connecting rod (3) via a piston pin (... | 12/12/2006 |
| 7066118 | Compression ratio variable device in internal combustion engine A compression ratio changing device in an internal combustion engine includes a piston inner element, a piston outer element slidably fitted over an outer periphery of the piston inner element for sliding movement only in an axial direction and capable of being move... | 06/27/2006 |
| 7043349 | Method and system for inferring exhaust temperature of a variable compression ratio engine A method for operating a variable compression ratio internal combustion engine includes the steps of determining a compression ratio operating state of the engine and inferring an exhaust temperature for the engine based at least in part on the compression ratio ope... | 05/09/2006 |
| 6966282 | Internal combustion engine variable compression ratio system An internal combustion engine variable compression ratio system. The system includes an inner piston connected to a connecting rod, an outer piston fitted around the outer periphery of the inner piston so that the outer piston can slide only in the axial direction, ... | 11/22/2005 |
| 6966279 | Piston cooling system for an internal combustion engine A piston cooling system for an internal combustion engine has a connecting rod assembly for connecting a piston to a crankshaft. The connecting rod assembly may have a connecting rod, a connecting rod bearing, a piston pin bushing, and a piston pin. The connecting r... | 11/22/2005 |
| 6945210 | Combustion chamber with one concave surface and three convex surfaces A combustion chamber assembly for use in a piston of a diesel engine includes a combustion chamber defined intersecting a crown of the piston, the combustion chamber being defined by a concave surface in cooperation with three convex surfaces, adjacent surfaces havi... | 09/20/2005 |
| 6907849 | Piston A piston (11) incorporates spring means acting, in use, between the piston and an associated connecting rod so as to bias the connecting rod away from the crown (112) of the piston. The spring means (117) is integrally formed with the pistons (111 | 06/21/2005 |
| 6598567 | Reciprocating internal combustion engine An internal combustion engine (1010) having an adjustable compression ratio is disclosed. The engine includes a housing (1013), a piston assembly (1012) adjustably coupled to the housing, and a cylinder(1014) reciprocatingly disposed within the housing. T... | 07/29/2003 |
| 6273052 | Coupling arrangement for reciprocating piston engine A coupling arrangement for interconnecting a piston gudgeon pin and a crankshaft journal of a reciprocating piston engine, the arrangement comprising: a connecting rod having a first end pivotally connected to the crankshaft journal, a connection member p... | 08/14/2001 |
| 5865092 | Engine connecting rod and double piston assembly A piston for internal combustion engines with an inner piston eccentrically disposed inside the outer piston. The outer piston is attached to a journal at the top of the connecting rod by a wrist pin in the usual manner. The inner piston is attached by a ... | 02/02/1999 |
| 5769042 | Method of operating an internal combustion engine during a combustion process The present application relates to a method of operating an internal combustion engine during combustion process that makes it possible to breake the increase of the gas pressure at the beginning of combustion, and partially to replace it by a lengthened ... | 06/23/1998 |
| 5755192 | Variable compression ratio piston A piston for an internal combustion engine has a trunk portion and a crown portion slidably mounted above the trunk portion. The entirety of the trunk portion extends above the piston's wrist pin bore. A resilient element positioned the crown portion with... | 05/26/1998 |
| 5724863 | Connecting rod In a connecting rod of a piston machine which comprises two separate parts which are longitudinally movable relative to one another but operatively interconnected and of which one part is connected to the piston and the other is rotatably mounted on the c... | 03/10/1998 |
| 5476074 | Variable compression height piston for internal combustion engine A variable compression height piston for reciprocating internal combustion engine includes a lower piston coupled to a connecting rod and an upper piston slidably carried upon the lower piston. A hydraulically actuated mechanical latching system interpose... | 12/19/1995 |
| 5417185 | Variable compression piston In an internal combustion engine, an eccentric bearing (16) located between the connecting rod (14) and the piston pin (12) can be used to vary the compression ratio. In this invention the eccentric bearing is held in any position by a continuously variab... | 05/23/1995 |
| 5331928 | Variable compression piston An engine having a variable piston capable of adjusting an engine's compression ratio while cranking or operating throughout an engine's speed/load range. Control may be obtained through varying the volume of lubricating fluid supplied to an inertia opera... | 07/26/1994 |
| 5257600 | Variable compression piston An apparatus for maintaining a consistently high compression ratio in an internal combustion engine utilizing a variable compression piston assembly. The piston having an outer piston mounted on an inner piston with an upper oil chamber therebetween. The ... | 11/02/1993 |
| 5191862 | Reciprocating piston with variable compression height for internal combustion engines A reciprocating piston is disclosed with variable compression height for internal combustion engines in particular. For structural simplification of the temperature-dependent change in the compression height of the reciprocating piston, a spring is provid... | 03/09/1993 |
| 5178103 | Variable compression ratio piston A variable compression ratio device for an internal combustion engine includes a connecting rod having passages formed therein for communicating a hydraulic signal to the piston attached to the connecting rod, means for generating a hydraulic signal havin... | 01/12/1993 |
| 4979427 | Temperature-sensitive variation of the compression ratio in pistons having variable compression height The invention relates to a piston having a variable compression height and two control chambers connected to each other through a hydraulic system. In order to achieve better cold-start and warm-up behavior, an oil discharge bore from the upper control ch... | 12/25/1990 |
| 4934347 | Variable compression piston arrangement for internal combustion engine The pressure prevailing in a variable volume chamber which controls the compression ratio developed by a piston, is used control the movement of a valve which regulates the supply and draining of the chamber. During high load the high pressure is used to ... | 06/19/1990 |
| 4890588 | Means to control piston movement in relationship to crank arm rotation in an internal combustion engine A means to control piston movement in relationship to crank arm rotation in an internal combustion engine is provided. There is provided a system to permit the crank arm of an engine to rotate a number of degrees past what would be the normal TDC (TOP DEA... | 01/02/1990 |
| 4864814 | Continuous combustion heat engine Continuous combustion heat engine including a compressor (12), combustor (14) and expander (16) which operates on a Brayton cycle with positive displacement pistons (90) in the compressor and variable expansion ratio pistons (190) in the expander. Compres... | 09/12/1989 |
| 4809650 | Variable compression control arrangement for internal combustion engine To induce high compression engine operation hydraulic fluid is fed into a variable volume chamber defined between an outer piston and an inner one which is reciprocatively disposed therein via a supply passage which includes a one-way valve. When low comp... | 03/07/1989 |
| 4785790 | Variable compression height piston arrangement An arrangement for the control of the oil feed into a control chamber of a piston with variable compression height for internal-combustion engines comprises a control valve in the longitudinal bore of a connecting rod that is provided with a flow-through ... | 11/22/1988 |
| 4784093 | Arrangement for controlling the oil feed to a control chamber of a piston with variable compression height The invention relates to a piston with variable compression height, particularly for internal-combustion engines, that consists of an interior piston part to which a connecting rod is coupled, and an exterior piston part that is slidably held at said inte... | 11/15/1988 |
| 4515114 | Two part piston assembly A two-part piston assembly is disclosed for increasing the removal of exhaust gases from an internal combustion engine during the exhaust stroke. The two-part piston (14a), (16a), shown in several embodiments, may include an appropriately adjusted spring ... | 05/07/1985 |
| 4510895 | Pistons for internal combustion engines A piston (10) for a diesel engine is formed with a combustion bowl (21) which has a lesser volume until the cylinder pressure reaches that at which fuel ignition takes place. The volume of the combustion bowl is then increased to reduce the maximum pressu... | 04/16/1985 |
| 4469055 | Controlled variable compression ratio piston for an internal combustion engine The compression ratio of an engine is controlled to optimize efficiency or performance, or both. The effective length of the piston is varied to change the compression ratio, by means of one of several piston configurations for adjusting the effective pis... | 09/04/1984 |
| 4463710 | Engine connecting rod and piston assembly The invention is a new and useful improvement in the design of connecting rods and pistons for use in reciprocating piston driven internal and external combustion engines and in reciprocating compressors. In the design presented the connecting rod is pivo... | 08/07/1984 |
| 4359976 | Compression compensator A compression compensator for an internal combustion engine comprising a flexible disc of high heat resistant spring material is secured to the top of each of the engine pistons. In addition, a spiral spring may be placed between the disc and the piston t... | 11/23/1982 |
| 4342291 | Expandable piston motor An internal combustion engine comprises a piston having first and second coaxial parts movable axially relative to each other in the direction of reciprocation of the piston and having a chamber therebetween which varies in volume with the relative moveme... | 08/03/1982 |
